When a whale dies, its massive body silently sinks down, down, through the inky darkness, finally coming to rest on the silty seafloor. For the whale, it's the end of a 70-year-long life. But for a little-known community of deep-sea dwellers, it's a new beginning. First come the hungry hagfish, which can smell the whale from miles around. Then the sleeper sharks begin their prowl, feasting on skin and blubber. After about six months, the meat is gone. Year after year, decade after decade, the whale nourishes all kinds of organisms from zombie worms to squat lobsters to deep-sea microbes.